package com.pl.grainmall.seckill.scheduked;

import com.pl.grainmall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * 秒杀商品定时上架
 * 每天晚上3点；上架最近3天需要秒杀的商品
 * 当前00:00:00  -  23：59:59
 * 明天00:00:00  -  23：59:59
 * 后天00:00:00  -  23：59:59
 */
@Slf4j
@Service
public class SeckillSkuScheduled {

    @Autowired
    private SeckillService seckillService;

    @Autowired
    private RedissonClient redissonClient;

    private final String upload_lock = "seckill:upload:lock";

    //TODO 幂等性处理
    @Scheduled(cron = "0 * * * * ? ")
    public void uploadSeckillSkuLatest3Days() {
        //1.重复上架无需处理
        //分布式锁  锁的业务执行完成，状态已经更新完成，释放锁以后；其它人获取到就会拿到最新的状态。
        RLock lock = redissonClient.getLock(upload_lock);
        lock.lock(10, TimeUnit.SECONDS);
        try {
            seckillService.uploadSeckillSkuLatest3Days();
        } finally {
            lock.unlock();
        }


    }

}
